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            <a href="http://heatstress.com.my" title="Haba Stress Engineering">Haba <span>Stress</span> Engineering</a>
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        <h2 id="faq-1">The Benefits Of Weld Preheating And Reducing Thermal Stress</h2>
        <h3>PROBLEM:</h3>
        <ul>
            <li>Thermal Stresses Occur as Molten Weld Pools Cool</li>
            <li>Cracking Can Occur Both During and After Welding</i>
            <li>Colder Parent Metal Resists the Inevitable Contraction of the Weld Metal</li>
        </ul>
        
        <h3>SOLUTION:</h3>
        <ul>
            <li>Preheating reduces the temperature difference between the Weld Metal and the Parent Metal and Minimizes 
            Potential Cracking</li>
        </ul>
        
        
        <h2 id="faq-2">Pre Weld Heat Treating Aand High Heat Loss</h2>
        <h3>PROBLEM:</h3>
        <ul>
            <li>Heavy Wall Materials and Aluminum Alloys with higher thermal conductivity can act as a heat sink, 
            drawing heat away from a weld and cooling at an accelerated rate.</li>
        </ul>
        <h3>SOLUTION:</h3>
        <ul>
            <li>Preheat Heat treatment will reduce the cooling rate of the deposited weld material and allow a proper 
            fusion with the parent metal</li>
        </ul>
                
        <h2 id="faq-3">Pre Weld Heat Treatment Will Reduce Weld Perocity</h2>
        <h3>PROBLEM:</h3>
        <ul>
            <li>If moisture is present at a welded joint, the high heat of the welding arc will break the water 
            down into its elements, hydrogen and oxygen. The hydrogen by-product easily dissolves into the weld 
            metal and causes weld porosity during weld solidification.</li>
        </ul>
        <h3>SOLUTION:</h3>
        <ul>
            <li>Performing a pre weld heat treat drives away moisture from the welded joint.</li>
        </ul>
        
       <p><a href="#nav">Scrol to Top</a></p>
       
       <h2 id="faq-4">Pre Welding Heat Treatment Will Reduce Weld Hardening</h2>
      <h3>PROBLEM:</h3>
      <ul>
        <li>During and after completing of the welding process, both the weld pool and the Heat Affected Zone 
        (HAZ) can harden and crack when cooling at a rapid pace</li>
      </ul>
      <h3>SOLUTION:</h3>
      <ul>
        <li>By preheating the weld and the Heat Affected Zone (HAZ) the rate of cooling can be controlled and 
        reduced thereby eliminating problems associated with weld hardening</li>
      </ul>
        
       <p><a href="#nav">Scrol to Top</a></p>
       
      <h2 id="faq-5">Pre Weld Heat Treating Prevent Hydrogen Cracking</h2>
      <h3>PROBLEM:</h3>
      <ul>      
        <li>Electrode Coatings and Fluxes can often introduce moisture directly to the arc and weld pool. The 
        increase in moistures increases the possibility of weld or Heat Affected Zone (HAZ) cracking.</li>
        </ul>
      <h3>SOLUTION:</h3>
      <ul>
        <li>Preheating slows down the weld cooling rate which allows hydrogen to escape</li>
      </ul>
        
        <p><a href="#nav">Scrol to Top</a></p>
        
    <h2 id="faq-6">Weld Pre Heating Improves Material Microstructure</h2>
    <h3>PROBLEM:</h3>
    <ul>
        <li>Low Alloy Steels containing elements such as chromium, nickel, molybdenum, and vanadium are 
        susceptible to cracking in the Heat Affected Zone (HAZ)</li>
    </ul>
    <h3>SOLUTION:</h3>
    <ul>
        <li>Preheating improves the microstructure inside the HAZ by reducing the post weld cooling rate. 
        The reduced cooling rate produces:</li>
            <ul>
                <li>A more desirable and ductile microstructure to be formed</li>
                <li>Minimizes Under Surface Cracking</li>
            </ul>    
    </ul>
    
    <p><a href="#nav">Scrol to Top</a></p>
    
    <h2 id="faq-7">Refractory-Dry Out </h2>
    <h3>Combustion Heat Treatment Services</h3>
    <p>Haba Stress Engineering is a name you can trust for all of your on-site technical service needs. We own 
    and operate the most advanced and dependable fleet of Heat Treatment Equipment available for use in the field 
    today. Combine our advanced equipment technology, the best trained and most knowledgeable Heat Treatment 
    Technicians, and strategic locations of our field service centers and you have a combination that delivers 
    quality results on time and under budget.</p>
   
    <h3>ON-SITE FIELD HEAT TREATMENT TECHNOLOGY</h3>
    <h3>Combustion Services and Refractory Dry Outs</h3>
    <p>Refractory Dry Outs Give Your Linings</p>
    <ul>
        <li>Improved Refractory Strength</li>
        <li>Refractory Separation Eliminated</li>
        <li>Removal of Mechanical Water</li>
        <li>Minimize Explosive Spalling</li>
        <li>Avoid Thermal Stress</li>
    </ul>
    <h3>Improved Refractory Strengh</h3>
    <ul>
        <li>Near 1000 Degrees F Ceramic Bonding Takes Place.</li>
        <li>High Velocity Burners Apply High Pressure and Heat</li>
        <li>This Ensures Cross-Sectional Ceramic Bonding</li>
        <li>Increasing Refractory Strength, Resulting in Increased Service Life</li>
    </ul>
    
    <h3>REFRACTORY SEPARATION ELIMINATED</h3>
    <p>Proper Dry Out Ensures That Dual Component Linings Will Not Experience Sagging or Separation from Anchored
     Refractory By:</p>
     <ul>
        <li>Utilizing hot, cold, and intermediate thermocouples.</li>
        <li>Ensures proper through wall temperature gradients.</li>
        <li>1000 degrees f, ceramic bonding takes place.</li>
     </ul>
       
       <h3>REMOVAL OF MECHANICAL WATER</h3>
       <p>Refractory Heated too Quickly or Unevenly May:</p>
       <ul>
        <li>Lock moisture in, causing shortened refractory life.</li>
       </ul>
       <p>Proper Dry Out</p>
       <ul>
        <li>Removes mechanical water at closely controlled temperatures below 600 degrees F.</li>
       </ul>
       
       <h3>MINIMIZE EXPLOSIVE SPALLING</h3>
       <p>Controlled Dry Out Will:</p>
       <ul>
        <li>Slowly &amp; safely, force mechanical and chemical water from the refractory lining.</li>
        <li>Avoiding pressure buildup and explosive spalling.</li>
       </ul>
       
       <h3>AVOID THERMAL STRESS</h3>
       <p>Controlled Dry Outs Prevent</p>
       <ul>
            <li>Minute cracking</li>
            <li>Thermally induced stress which weakens the refractory.</li>
       </ul>
       
       <h3>INDUSTRIES REQUIRING REFRACTORY DRY OUTS</h3>
       <ul>
        <li>Steel Mills</li>
        <li>Aluminum</li>
        <li>Foundry</li>
        <li>Glass</li>
        <li>Cement</li>
        <li>Ceramic</li>
        <li>Refineries</li>
        <li>Chemical Plants</li>
        <li>Power Plants</li>
       </ul>
       
       
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    </article>
     
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    <h3 class="title">Sitemaps</h3>
        <ul>
            <li><a href="#faq-1">The Benefits Of Weld Preheating And Reducing Thermal Stress</a></li>
            <li><a href="#faq-2">Pre Weld Heat Treating And High Heat Loss</a></li>
            <li><a href="#faq-3">Pre Weld Heat Treatment Will Reduce Weld Perocity</a></li>
            <li><a href="#faq-4">Pre Welding Heat Treatment Will Reduce Weld Hardening</a></li>
            <li><a href="#faq-5">Pre Weld Heat Treating Prevent Hydrogen Cracking</a></li>
            <li><a href="#faq-6">Pre Weld Heating Improves Material Microstructure</a></li>
            <li><a href="#faq-7">Refractory-dry out</a></li>
        </ul>
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            <li><strong>Haba Stress Engineering</strong></li>
            <li>No. 59, Jalan Bukit 9, Kaw. MEIL, Bandar Seri Alam,</li> 
            <li>81750 Masai, Johore, Malaysia</li>
            <li>Email: info@heatstress.com.my</li>
            <li>Tel: (+6) 07217&nbsp;3013</li>
            <li>Mobile: (+6) 013-721&nbsp;3013</li>
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